Tire-changing stand with a rotatable tool supporting shaft



G. E. COATS 2,505,172 TIRE cnmamc sum: wrm A ROTATABLE TOOL SUPPORTING SHAFT April 25, 1950};

3 Sheets-Sheet 1 Filed May 8, 1947 INVENTOR.

Gi/berz 15. 60a is Aprll. 25, 1950 G. E.,coATs 2,505,172

TIRE CHANGING STAND WITH A ROTATABLE TOOL SUPPORTING SHAFT Filed May 8, 1947 3 Sheets-Sheet 2 IN VEN TOR.

Aprll 25, 1950 v G. E. COATS 2,505,172

TIRE CHANGING STAND WITH A ROTATABLE TOOLSUPPORTING SHAFT Filed May a, 1947 3 Sheets-Sheet s UIIIIIIIIIII.

Winn-IMP! m in s 7 ma INVENTOR. Gi/berf -E. C'aa is --and-an appreciable amount of hammering.

Patented Apr. 25, 1950 UNITED STATES 'ATENT OFFICE TIRE-CHANGING STAND WITH -A.ROTAT- ABLE TOOL SUPPORTING SHA'FT Gilbert E. Coats, Fort Dodge,Iowa

Application May 8, 1947, Serial No. 746,749

1 Claim.

1 This invention relatesv to adevice for removing and replacing'a tire on a vehiclerim.

At-the present time much difiiculty and incon- 1 venience i generally encountered in tire shops and garages in removing tires from and replacing tires on vehicle rims, particularly on rims of so-called drop center type, which are now .in

common use. These operationsare usually accomplished by the use of tire arms, much effort y this procedure the rims are often times damaged,

the tire casing. bruised, and the tire tube many times pinched within the casing.

It is an object of this invention, therefore, to

aprovide an improved device for changing tires.

Another object of i this invention is to provide adevice for removing'a tire from a rimgandre- ..placing the tire on the rim with a minimum i amount of time and effort and-with a complete elimination of :any damage or injury to the tire and rim.

A further-object of this invention is to provide a tireichanging device forsupporting a rim in a fixed centered position and having tire-engaging tools detachably supported for rotation about the axis ofthe rim adapted, in separate opera- 'tions, to "progressively separate the tire beads from'the rim and move the tire beads within the Anotherobjectof this'invention is to provide a tire changing device which is of a compact construction so as to occupy a minimum of space in agarage or tire shop, eflicient in operation' to re- -move and replace a tire .on'a rim;:and.read ily *applicable tovehlcle rimsof varying types.

' A featur'e of this invention is found in'thepro- ""visi'on of a-tire changing device 'in"which an upright support has a rotary member projectedupwardly from its top end, and means for holdin a vehicle rim in a stationary horizontal centered position relative to the rotary 1 member.

A first tool, movable about the rotary member asa fulcrumis adapted to separate and remove the tire beads fromthe rim. A second toOLdeta'chablypivoted at one encLon the rotary member forupia'nd .down pivotal movement, and for. r0- .tational movement. aboutthe rim, has a pair. of eoppositely arranged tirewengaging units which areoperable, on. independent rotational movements of the second tool;about-the--rim, to ac- -comp1ishrin succession "the, replacement of the "tire beads on the: rim.

,. :Further "objects; features" and; advantages :of

if this invention wili become: apparent from: the

tire. changing device;

Fig. 4 is. a side elevational view of a tire tool .iorming part of the tire changing device, which is used to replace altire on a rim;

Fig. 5.is. a. fragmentary plan view of the tool shown in Fig. 4 with parts. removed;

Fig. 6 is. afragmentary bottom plan view oi.

the tool shown in Fig. 4 with parts. removed;

Fig. '7 is. a. sectional view takensubstantially on the line in Fig.2 with certain parts shownin ,elevation and other parts broken away to more clearly show the construction of the device;

Fig. 8.is.a detail sectional view on the line 88 in Fig. ,7;

Fig. 9; is an enlarged detail sectional View as seen on the line. 9-9 in Fig. 7;

Fig. 10 vis a fragmentarysectional view showing the vehicle rim in assembly relation with the tire changing device, and the tool of Fig. 4 in position for replacingthe lower tire bead on a rim;

Fig. 11 is illustrated similarly toFig. 10 and shows 17118113001 of Fig. 4.in position forreplacing the upper :tire bead on a rim;

Fig. 12 is'a fragmentary sectional view asseen onthe line Ill-l2 in Fig. 11;

Fig. .13 is aperspective-view of a tire tool for removing a tire from a rim and which forms part of the tire changing device of this inven- 1 tion Fig. 14 e is. an. enlarged detail sectional view taken on the line I4--l4,in Fig. 13;

I -Fig. 15 is a perspective view of an attachment for the tool in Fig. 13 for initially-breaking the the head from a rim;

Fig. 16 isan enlarged sectional view as seen on the line |6-16 in Fig. 15;

Fig. 17 is a view illustrated similarly to Fig. 10

1 showing the relative assembly of the attachment in Fig. 15 and the tool in Fig. 13 for breaking the uppertire bead from a rim; and

Fig. 18 illustrates the use of the tool in Fig. 13

for removing the upper tire bead from a rim.

With reference to the drawings, the-tire chang- .ing deviceof thisinvention is illustrated in Figs.

1" and 2 as including a fiat base I5 adapted to be secured: to a" floor surface by t the provision of anchor bolts (not shown) extended through the base openings [5. Projected upwardly from a central position on the base I is a tubular standard or support I1, which is braced relative to the base by gusset or brace plates l8. Mounted on the upper end of the standard 11, in a concentric relation therewith, is a horizontal laterally extended circular flange I9, formed with a central opening 26 corresponding in size substantially to the inner diameter of the standard ll. Secured, as by welding, to the upper side of the flange I9, and in a concentric relation therewith, is an upright ring member 2| of a diameter greater than the diameter of the tubular standard l1.

Coaxially arranged in a spaced relation within the standard H and projected upwardly from its upper end through the flange opening and ring 2!, is a tubular bearing'22, the lower end 23 of which terminates about midway between the opposite ends of the standard IT (Fig. '7). bearing 22 is supported in a fixed spaced relation within the Standard 4? by the provision of Wing or brace members 24. A tubular rotary member 26 is rotatably supported within the bearing 22 and is maintained against axial movement relative thereto by means of collar members 2? carried at opposite ends of the rotary member and adapted for abutting engagement with the corresponding opposite ends of the bearing 22. Ex-

tended within the upperend of the rotatable member 26, and secured thereto as by welding, is a bracket member 28 (Fig. 9) of a substantially U-shape formed with oppositely arranged openings 29 in the legs thereof.

The lower end of the tubular standard IT is formed with a pair of oppositely arranged axially extended slots 3! (Fig. 7) for receiving a foot operated lever 32 having one end pivoted at 33 to a collar member 34 fioatingly carried on an upright bolt 35 secured to the base l5. The collar member 34 is biased in a downward direction by the action of a coil spring 31 mounted about the bolt 36 and arranged in compression between the bolt head 38 and the collar 34.

The lever 32 is yieldably movable in an upward direction, or clockwise, as viewed in Fig. '7, by the provision of a tension spring 39 connected at its lower end to the lever 32 at a position adjacent to its pivoted end, and at its upper end to a radially extended projection 4| carried on the standard ll. 7

A catch member 42 (Figs. 7 and 8) is secured to the lever 32 at a position near its free end, and is adapted to be selectively engaged with one of the notches 43 formed in an upright lock bar axially thereof is a clamp rod 45 (Figs. 1 and '7) which is pivotally connected at its lower end 4'! with the foot lever 32. The upper portion of the clamp rod is slidably extended through a bearing 45 and has a hook 48 formed at its upper end. When the lever 32 is in its upwardly moved position, as illustrated in Fig. 7, the hook 48 is positioned above the level of the ring member 2 I.

A tire-engaging tool, indicated generally as 45, (Figs. 4, l0 and 11) includes a tubular handle member 49 having a fiat bar member 5i extended axially outwardly from its end 52 The bar 5| The L is formed with a series of adjustment holes 53 and 53a with the hole 53a being of a substantially slot shape with serrated side walls formed by drilling holes closely together.

The tool 45 is provided adjacent its end 52 with a first tire-engaging unit, indicated generally as 55 (Figs. 4 and 5), for placing on a wheel rim what shall hereinafter be referred to as the lower head of a tire. The unit 53 includes a pair of spaced laterally extended supports 56 which are inclined at an angle away from the handle end 52. Rotatably supported at the free ends of the supports 55 is a usual type sheave or pulley 5'? having a peripheral groove 58.

Arranged on the handle 49 at a position opposite from the unit 50, is a second tire-engaging unit 55 (Figs. 4 and 6) for replacing on a wheel rim what shall hereinafter be referred to as the upper bead of a tire. The unit 55 has a pair of spaced laterally extended supports 59 and 59a which are inclined away from the handle end 52 at an angle less than the angle of inclination of the supports 56 in the unit 50. Rotatably supported adjacent the free ends of the supports 59 and 59a on a pin 60 is a rotary member 6| having a peripheral flange 62 on only one of its sides. In practice the member 6| is formed from a usual type sheave, by merely removing one of the sheave side faces.

A collar member 63, coaxial with the rotary member 6! is also carried on the pin 60 between the supports 59. As best appears in Fig. 4, it is seen that both the member BI and collar 63 extend beyond the free ends of the supports 59 and 59a. Extended laterally from the support 59a is a bracket member 64 on which a roller 66 is rotatably supported. The support 59a, bracket 64 and roller 55 are relatively arranged and constructed so that the roller 66 is positioned outwardly from one side of the rotary member-6| such that the plane of the flange 62, indicated at A in Fig. 6, is substantially tangential to the roller 56 for a purpose which will later appear.

The tool, designated generally as H30 in Figs. 13 and 14, is provided for the purpose of removing a tire from a rim and includes a tubular handle Ifli having a first flat bar H12 extended longitudinally from its end I03, and a second flat bar I04, of a length longer than the bar I02, projected longitudinally from its opposite end N36. The bar I52 is formed with an opening lt'l, while the bar )4 rotatably carries a roller I08 on a pin Hi9 extended normal to the plane thereof.

A bead breaking attachment H0 (Figs. 15 and 16), for the tool I00, has a tubular body member ill slidably receivable on the handle Ill! and maintained in a longitudinally adjusted position on the handle by a friction or look screw H2. Projected laterally from the body member HI, at a position substantially opposite the lock screw H2, and at a slight angle relative to the axis of the member III, is a fiat arm H3 having a stub shaft l M adjacent its free end. The shaft H4 is normal to the plane of the arm H3 and rotatably supports a substantially cone shape disc H5.

In the operation of the tire changing device, let it be assumed that a vehicle rim ll (Fig. 17) of a type generally used on Pontiac and Chevrolet cars, is to have the tire l2 thereon changed. For rims of this type the device is equipped with a pin or dowel 13 (Figs. 1, 2 and 17) which is arranged in an upright position adjacent to the upper end of the standard l1, and pivoted at its lower end for movement radially of the standard, between a pair of spaced lug members 14,

,upp'er end of the bearing sleeve 22.

distal-$2 whichjare supported from the "underside of the annular flange I9, The dowel I3 extends through the flange I9and is pivotally movable in 'aslot I3 formed in'theflange I9 and ring 2|.

The rim II (Fig. 1'7) is arranged in a flat hori- 'zontal position with its inner side 8|, relative to its position on a car, resting on the top of the ring 2|. Stated otherwise, the central rim cavity 82, which is closed bya usual hub cap Knotshown) is faced upwardly. With the rim in this horizontal position the dowel I3 is moved so as to extend through one of the axle bolt holes 83 in the rim side ill to hold the rim against rotation. It is seen, therefore, that the rotary .to extend within and engage the rim side 8| at the usualcentral opening 88 therein.

. With the clamp member 84 thus positioned,

, as shown in Fig. 17, the foot lever 32 is released from the notched lock member 44, to permit the gup'ward movement of the clamp rod 46 within .the standard H in response to the action of the spring 99 The hook 48 is then positioned over i one of the wings 87 and the foot lever 32 is de pressed to rigidly clamp and center the rim II with the standard.

By virtue of the floating collar 34, the lever 32 I03 to the bracket 28 by positioning the bar I02 between the bracket legs and inserting a pin 93 between the aligned openings 29 and I02 (Fig. 17).

The bead breaking attachment H0 is then mounted on the handle IOI, with the arm II3 extended downwardly and inclined toward the handle end I03, and moved toward the handle end I03 until the lower peripheral edge III of the disc H6 is against the outer peripheral edge 92 of the rim H. The lock screw II2 is then tightened to hold the attachment IIO against movement longitudinally of the tool I00.

With the tool I00 and attachment H0 thus relatively assembled and supported on the rotary member 29 the handle IOI is pivoted back and forth and moved about the rim I I, concurrently with being pressed downwardly against the upper bead 9| of the tire 12, as shown in Fig. 17. In this manner the bead 9| is completely broken away from the rim II.-

On the completion of this operation the attachment H9 is removed from the tool I00, which is then disconnected from the rotary member 22 by taking out the pin 93.

The tool I00 is then gripped adjacent to its end I03 and manipulated as a tire arm to provide for the insertion of that portion of the flat bar I04, located outwardly from the roller I09, between the bead 9I and the peripheral edge '92 of the rim II (Fig. 18). By pressing downv wardly on the tool end I03 that part of the bead 9| engaged by the bar I04 isseparated from the rim II. With this separation effected, the bar IM is moved inwardly of the tire I2 until the "roller I08 engages the head 9 I.

The tool I00 is then moved against the upper projected end of the hearing 22, and with the bearing asa fulcrum is moved about the rim II to progressively separate the bead 9| from the 'rim. The engagement of the roller I08 with the bead 9| substantially holds the tool Hi0 against longitudinal'movement relative to the bearing 22, and prevents the insertion of the bar Hi l within the tire E2 to an extent which would result in injury to the tiretube (not shown).

When the upper bead 9| is separated from the rim H, the tire is moved upwardly on the rim to locate the bottom bead 94 below the peripheral edge 92 of the rim II. The tool I06 is then manipulated, similarly to its operation for the upper I or top bead 9|, to provide for the separation of the lower bead 94 from the rim. The tire i2 is thus freed of the'rim so as to be lifted therefrom r for repair purposes.

To replace the tire on the rim, it is positioned with its lower bead 94 adjacent to the rim edge 92 (Fig. 10). The tire tool45 is then arranged with the tire engaging unit 50 extended downwardly and is pivotally connected at its end 52 with the V rotary member 26 by placing the bar 5| between the legs of the U-member 28 and inserting the pin 93 through the aligned openings 29 and an opening 53 and 530i. The selection of an opening 53 and 53a is determinedby a position of the tool 45 such that'the outer edge of the sheave 5?, in the tire engaging unit 50, receives the bead 94 within the annular groove 58, when the handle 49 is extended radially from the support IT in a substantially horizontal position above the tire and rim assembly.

With the tool 45 thus positioned, as illustrated in Fig. 10, the handle 49 is moved about the rim II whereby the bead 94 is progressively moved to the outside and below the rim edge 92 by the sheave '51. As a result the bead 94 is completely replaced on the rim by the rotation of the handle 49 through one complete revolution about the rim. On completion of this operation the tire I2 is moved downwardly on the rim II so that the upper bead 9| is above the rim edge 92. The tool 45 is then removed by pulling out the pin 93, and is pivotally connected with the bracket 28 in an inverted position, relative to its showing in Fig. 10, so that the tire-engaging unit 55 extends downwardly, as illustrated in Fig. 11, with the flange 62 of the rotary member 6! against the rim edge 92.

By pressing downwardly on the free end of the handle 49, the upper bead 9| is moved below the rim edge 92 to an extent determined by the engagement of the collar 83 with the rim edge 92. At this downwardly moved position the roller 66 is engageable with the inner peripheral surface of the tire bead 9 I, as shown in Fig. 12. On rotation of the handle 49 in a direction such that the roller 96 is in a leading relation with the rotary member 8 I, the bead 9| is progressively moved to the outside of the rim edge 92 by the roller 65, and within the rim by the action of the rotary member 6|.

After the bead 9| has been replaced within the rim, the tool 49 is removed from the device, and the foot lever 32 is released to free the clamp rod 46 from its engaged position with the clamp member 84'. On removal of the clamp member the tire and wheel assembly are lifted from the stand ard [1.

A like operation of the device takes place for rims of the type used on Ford V-8 automobiles except that the stationary upright dowels l! and clip members I02 on the flange I9 are used in place of the pivoted dowel 13 for holding the rim against rotation relative to the support 11.

From a consideration of the above description,

it is seen that the invention provides a tire changing device which is of a simple and compact construction, and adapted to efiiciently and easily break a tire loose from a rim, remove the tire from the rim, and then replace the tire on the rim with a minimum of inconvenience. The device is applicable to operate on a wide variety of tire and rim assemblies and accomplishes a complete tire change in a series of successive and continuous operations.

Although the invention has been described with respect to a preferred embodiment thereof, it is to be understood that it is not to be so limited since. changes and modifications can be made therein which are within the full intended scope of this invention, as defined by the appended claim.

I claim:

In a device for removing and replacing a tire on a wheel rim having a center opening therein, an upright tubular member adapted to support the rim in a horizontal position on the upper end thereof, a bearing member concentrically arranged within said support and projected from the upper end thereof to receive loosely the center opening of said Wheel rim, a shaft rotatably supported within said bearing member having the upper end thereof projected upwardly from said bearing member, a tire-engaging unit connectible with the upper end of said shaft, means for locking said rim on the support in a centered position therewith including a tubular wedge member slidably receivable on the projected end of said hearing member and adapted to enter the center opening of said rim, means for clamping said wedge member downwardly between said bearing member and the wall of said center opening including an upright vertically movable clamp member positioned between said support and bearing member having a wedge engaging portion at its upper end, and means for moving said clamp member into and out of a wedge-clamping position.

GILBERT E. COATS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 643,528 Palmer Feb. 3, 1900 965,076 Carle July 19, 1910 1,316,390 Rischard Sept. 16, 1919 1,341,726 Weaver et al June 1, 1920 1,341,727 Weaver June 1, 1920 1,416,094 Krauska May 16, 1922 1,587,634 Dickey et al June 8, 1926 2,000,036 Renfro May 7, 1935 2,034,819 Maulis Mar. 24, 1936 2,057,200 McCarthy Oct. 13, 1936 2,075,421 Bennett Mar. 30, 1937 2,171,282 Wochner Aug. 29, 1939 2,201,982 Bazarek May 28, 1940 

